Rewrite ReliableChatRoom#142

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UncooleBen wants to merge 3 commits intoaspnet:mainfrom

UncooleBen:ReliableChatRoom

Commits on Nov 11, 2020

Split master into two branches: ReliableChatRoom (2/2)
Juntao Peng
committed

Commits on Nov 23, 2020

Merge ReliableChatRoom contents from master
UncooleBen
committed

Commits on Dec 11, 2020

Integrate server-side AAD sign-in and update README.md
UncooleBen
committed